I had the same problem a few years ago and yes the safety light sensors had been "kicked" by a broom and being out of adjustment told the opener that something was in the way of the door, so it stops the door and (usually) then causes it to go back up, stop, and the opener light blinks several times.
It did it again this week but nothing was wrong with the adjustment or lube of anything. BTW, don't lube the rail at the top of the garage ceiling for the chain "shoe" to run on. Most of them should NOT be lubed.
Anyway, I finally found that the wire connection of the safety sensor was not really a solid connection. The wires were only lightly twisted together and held together by the infamous black plastic tape. The tape had come loose and the wires were then intermittently disconnected. No connection or intermittent connection is another signal to the opener that something is wrong, and possibly dangerously wrong so it needs to stop before it closes totally, then tells the unit to open the door completely.
Check your wire connections. If they are connected but have that good old black tape over the connection, remove the old tape, secure the wires TIGHTLY and then apply new tape to protect the connections. That may well resolve your problem.
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